package 牛客;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.regex.Pattern;

public class ces {
    public static void main(String[] args){
        System.out.println(foo(16,13));
    }
    public static int foo(int x ,int y ){
        if (x<=0||y<=0) return 1;
        return 2*foo(x-6,y/2);
    }
}
